71 This is the first time I have eaten this kid of food
72 Peter speak English better than Jane
73 I haven't seen her for 10 years
74 It two years since she moved to london
75 he has worrked as a teacher for 5 years
76 our teacher watned not to sit in front of the computer for too long
77 I spent my holiday in Da lat, which is wone of the famous landscapes in vietnam